B7M bolts are specifically for applications where bolting could be exposed to the H2S-containing environment. B7M bolts and 2HM or 2M nuts are tempered and hardness tested versions of the B7 and 2H grades. HRC 22 is the maximum allowable hardness.
I have been looking into digital radiography for my company as well. An associate at another company had a situation arise where a post stress film radiograph showed an indication that was not visible in the pre-stress digital radigraph. The NDE company has told this associate that cracks...
First of all SA335-P11 is P No. 4 material not P3, the P11 is a group number not a P number. To determine the need for PWHT you would have to tell us the Schedule/wall thickness of the material. You do not have to PWHT P4 material provided; it is 1/2 thick or less, has a carbon content of .015...
Your client is right. You will have to qualify a P1-P4 procedure. A change in P number is an essential variable.
The base metal that you test on doesn't negate the need for a qualified welding procedure.
However, if you have welders that are qualified to weld the P4-P4 procedure they...
According to B31.1 (para. 132) you do not have to PWHT P5A (2.25 Chrome) material if it is 4" in diameter or less, 1/2" thick or less and has .15% carbon or less.
We are having a debate as to whether this exemption allows you to weld the material with a procedure that has been...
B31.1 Does pertain to Boiler External and Non-Boiler External Piping. However one of the major differences is the Jurisdictional and Administrative Responsibilities for B31.1 piping. B31.1 piping will refer you back to ASME Section I Boiler Code whereas B31.1 usually provides all of the...